Carpenters pause for a group photo during construction of the Giant Dipper in 1924. The rollercoaster, which opened that same year, is considered the fifth oldest rollercoaster in the US still operating in its original location, according to the Santa Cruz Beach Boardwalk's web site.

Then: A guest with a tiger at Marine World Africa USA in the late 1980s in Vallejo.

Then: A guest with a tiger at Marine World Africa USA in the late 1980s in Vallejo.

Photo: Michael J. Preovolos

Then: A guest with a tiger at Marine World Africa USA in the late...photo-7334691.180684 - |ucfirst

Then: Marine World

The Main Plaza to Marine World in 1988.

Then: Marine World

The Main Plaza to Marine World in 1988.

Photo: Courtesy Of Six Flags Discovery Kingdom

Then: Marine World
The Main Plaza to Marine World in 1988. photo-15478584.180684 - |ucfirst

Then: Marine World before it becomes Six Flags Marine World

By 1998, the park ditched the "Africa USA" tagline and briefly became Marine World. While the park still had animal attractions, more rides were opened before animal attractions eventually transitioned to educational animal presentations. This 1999 file photo shows the dolphin pool in Marine World. The park had been in debt with Vallejo for a few year before ownership was turned over to the city. Vallejo then hired Premier Parks (which would later become Six Flags) to update the site and they added more rides to replace animal attractions. By 1999 the park name was changed to Six Flags Marine World.

The park rebranded as Six Flags Discovery Kingdom in 2007 as a way to address the drop in attendance and more rides were added to attract crowds. In 2016 the Wonder Woman Lasso of Truth ride, a thrilling swing pendulum, opened.

This image may capture the crowd at Los Angeles Raging Waters in this undated photo taken around the late 1980s to early 1990s. But the image gives a peek at how the San Jose outpost might have looked when it opened to the public in 1985.

Guests at Playland-at-the-Beach in San Francisco in the late 1930s or early 1940s. Playland opened to the public in 1926 (although the park had been around previously under a different name) but eventually closed in 1972 and the park was demolished to make room for condominiums, the Chronicle's Peter Hartlaub wrote.

This file photo shows the carousel at Playland on Aug. 18, 1972, shortly before the San Francisco amusement park was demolished. The carousel, formally known as the Zeum Carousel, was purchased after the park closed and moved for storage to New Mexico, then purchased and moved to Long Beach before the City of San Francisco bought and restored it in 1998. less

Then: Playland-at-the-Beach

This file photo shows the carousel at Playland on Aug. 18, 1972, shortly before the San Francisco amusement park was demolished. The carousel, formally known as the Zeum Carousel, ... more

Although Playland closed for good in 1972, the carousel lives on and can be found at the Children’s Creativity Museum in Yerba Buena Gardens today. In 2014 it was renamed after LeRoy King, the former San Francisco Redevelopment Commissioner.